Coil rheostat for use with electrical vibrator

Made:
1890-1910 in France
Coil rheostat, wall mounted, for use with electrical vibrator

Creative Commons LicenseThis image is released under a CC BY-NC-SA 4.0 Licence

Coil rheostat, wall mounted, for use with electrical vibrator
Science Museum Group

Coil rheostat, wall mounted, for use with electrical vibrator, French, 1890-1910